Using leaked credentials violates MEGA's Terms of Service and may involve legal issues related to unauthorized access to computer systems. How to Secure Your Own MEGA Account
These lists are frequently used in automated "stuffing" attacks, where hackers test stolen username/password pairs across multiple sites to find working logins. 4200 mega.nz accs by LB.zip
Use a strong, unique password specifically for MEGA. Using leaked credentials violates MEGA's Terms of Service